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ludwig457
 3 years ago
Find the area of an equilateral triangle with side of length 18. (Round your answer to one decimal place.)
ludwig457
 3 years ago
Find the area of an equilateral triangle with side of length 18. (Round your answer to one decimal place.)

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ludwig457
 3 years ago
Best ResponseYou've already chosen the best response.1Area= 1/2 base x height tan(60)=h/18 h=18tan(60) right?

ludwig457
 3 years ago
Best ResponseYou've already chosen the best response.1should i be using law of sines

lgbasallote
 3 years ago
Best ResponseYou've already chosen the best response.1why use law of sines?

lgbasallote
 3 years ago
Best ResponseYou've already chosen the best response.1wait...by law of sines do you mean \[\frac{a}{\sin A} = \frac b{\sin B} = \frac c{\sin C}\]

ludwig457
 3 years ago
Best ResponseYou've already chosen the best response.1yes, i have three angles (60) and three sides) so the how would i then find the height

lgbasallote
 3 years ago
Best ResponseYou've already chosen the best response.1use pythagorean theorem...you have equilateral triangle dw:1352707222314:dw

lgbasallote
 3 years ago
Best ResponseYou've already chosen the best response.1so the height would cut your triangle into two equal parts..dw:1352707262694:dw can you see how to get the height now?

lgbasallote
 3 years ago
Best ResponseYou've already chosen the best response.1now use your 1/2 bh

lgbasallote
 3 years ago
Best ResponseYou've already chosen the best response.1by the way.. you can also use your solution a while ago... 18tan (60) you don't need law of sines...just use a calculator for that

ludwig457
 3 years ago
Best ResponseYou've already chosen the best response.1and that solution from earlier would then give me the height?

lgbasallote
 3 years ago
Best ResponseYou've already chosen the best response.1hmm wait...something's wrong with it...let me find it first

ludwig457
 3 years ago
Best ResponseYou've already chosen the best response.1should it be 9 instead of 18
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